<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>注册页面</h1>
<form action="" enctype="multipart/form-data">
    <input type="text" name="username" placeholder="用户名" >
    <input type="text" name="password" placeholder="密码">
    <input type="text" name="nick" placeholder="昵称">
    <input type="file" name="picFile">
    <input type="button" value="注册" @click="reg()">
</form>
<!--引入vue-->
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<!--引入axios-->
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script>
let vm=new Vue({
    el:"form",
    data:{},
    methods:{
        reg:function () {
            let data=
                new FormData(
                document.querySelector("form"));
            //得到上传的文件
            let file=data.get("picFile");
            //如果没有选择图片 则不能注册
            if (file.name==""){
                alert("请选择上传的图片文件")
                return;
            }
            axios.post("/reg",data).then(function (response) {
                if (response.data==1){
                    alert("注册成功!");
                    location.href="/";
                }else {
                    alert("用户名已存在!");
                }
            })
        }
    }
})
</script>
</body>
</html>